interface ReadableStreamBYOBReaderPropertiesreadonlyclosed: Promise<void>Methodscancel(reason?: any): Promise<void>read<V extends ArrayBufferView>(view: V): Promise<ReadableStreamBYOBReadResult<V>>releaseLock(): voidvariable ReadableStreamBYOBReadertype{ readonly prototype: ReadableStreamBYOBReader; new (stream: ReadableStream<Uint8Array>): ReadableStreamBYOBReader; }